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Inhibitory Control During Smooth Pursuit in Parkinson's Disease and Huntington's Disease

Identifieur interne : 001B52 ( Main/Merge ); précédent : 001B51; suivant : 001B53

Inhibitory Control During Smooth Pursuit in Parkinson's Disease and Huntington's Disease

Auteurs : Tracy Henderson [Australie] ; Nellie Georgiou-Karistianis [Australie] ; Owen White [Australie] ; Lynette Millis [Australie] ; David R. Williams [Australie] ; Andrew Churchyard [Australie] ; Joanne Fieldin [Australie]

Source :

Movement disorders [ 0885-3185 ] ; 2011.

RBID : Pascal:11-0402092

Descripteurs français

Pascal (Inist)
- Maladie de Parkinson, Chorée de Huntington, Pathologie du système nerveux, Attention.

English descriptors

KwdEn :
- Attention, Huntington disease, Nervous system diseases, Parkinson disease.

Abstract

The basal ganglia are involved in the preferential selection and suppression of competing responses. Parkinson's disease and Huntington's disease are 2 prototypical basal ganglia disorders that feature impaired inhibitory control, a function of poor conflict resolution. Previous saccadic studies showed that individuals with Parkinson's disease experience difficulty suppressing unwanted ocular motor responses, whereas evidence for a similar difficulty in Huntington's disease is more equivocal. Relative to saccades, few research studies have examined inhibitory control processes in the context of an ongoing smooth pursuit task. In this study, we examined the ability of 16 patients with Parkinson's disease and 12 patients with Huntington's disease to suppress automatic responses to irrelevant distracters that transiently appeared during the tracking of a moving visual stimulus. Compared with an equivalent number of age-matched controls, patients with Parkinson's disease generated proportionately more saccades to distracter stimuli. This was particularly evident for distracters appearing far away from the target. Conversely, whereas individuals with early-stage Huntington's disease and healthy controls made a comparable number of errors toward distracter stimuli, those in a more advanced clinical stage demonstrated significantly poorer inhibitory control. The current findings in parkinsonian patients replicate those previously reported in the saccadic and manual response literature, demonstrating difficulty inhibiting a competing motor response. However, in Huntington's disease we demonstrate for the first time that inhibitory control declines in more advanced-disease stages. This suggests that ocular motility may provide a sensitive marker of clinical disease progression in Huntington's disease.

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Pascal:11-0402092

Le document en format XML

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<series><title level="j" type="main">Movement disorders</title>
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<front><div type="abstract" xml:lang="en">The basal ganglia are involved in the preferential selection and suppression of competing responses. Parkinson's disease and Huntington's disease are 2 prototypical basal ganglia disorders that feature impaired inhibitory control, a function of poor conflict resolution. Previous saccadic studies showed that individuals with Parkinson's disease experience difficulty suppressing unwanted ocular motor responses, whereas evidence for a similar difficulty in Huntington's disease is more equivocal. Relative to saccades, few research studies have examined inhibitory control processes in the context of an ongoing smooth pursuit task. In this study, we examined the ability of 16 patients with Parkinson's disease and 12 patients with Huntington's disease to suppress automatic responses to irrelevant distracters that transiently appeared during the tracking of a moving visual stimulus. Compared with an equivalent number of age-matched controls, patients with Parkinson's disease generated proportionately more saccades to distracter stimuli. This was particularly evident for distracters appearing far away from the target. Conversely, whereas individuals with early-stage Huntington's disease and healthy controls made a comparable number of errors toward distracter stimuli, those in a more advanced clinical stage demonstrated significantly poorer inhibitory control. The current findings in parkinsonian patients replicate those previously reported in the saccadic and manual response literature, demonstrating difficulty inhibiting a competing motor response. However, in Huntington's disease we demonstrate for the first time that inhibitory control declines in more advanced-disease stages. This suggests that ocular motility may provide a sensitive marker of clinical disease progression in Huntington's disease.</div>
</front>
</TEI>
<affiliations><list><country><li>Australie</li>
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<tree><country name="Australie"><noRegion><name sortKey="Henderson, Tracy" sort="Henderson, Tracy" uniqKey="Henderson T" first="Tracy" last="Henderson">Tracy Henderson</name>
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<name sortKey="Churchyard, Andrew" sort="Churchyard, Andrew" uniqKey="Churchyard A" first="Andrew" last="Churchyard">Andrew Churchyard</name>
<name sortKey="Fieldin, Joanne" sort="Fieldin, Joanne" uniqKey="Fieldin J" first="Joanne" last="Fieldin">Joanne Fieldin</name>
<name sortKey="Fieldin, Joanne" sort="Fieldin, Joanne" uniqKey="Fieldin J" first="Joanne" last="Fieldin">Joanne Fieldin</name>
<name sortKey="Georgiou Karistianis, Nellie" sort="Georgiou Karistianis, Nellie" uniqKey="Georgiou Karistianis N" first="Nellie" last="Georgiou-Karistianis">Nellie Georgiou-Karistianis</name>
<name sortKey="Henderson, Tracy" sort="Henderson, Tracy" uniqKey="Henderson T" first="Tracy" last="Henderson">Tracy Henderson</name>
<name sortKey="Millis, Lynette" sort="Millis, Lynette" uniqKey="Millis L" first="Lynette" last="Millis">Lynette Millis</name>
<name sortKey="White, Owen" sort="White, Owen" uniqKey="White O" first="Owen" last="White">Owen White</name>
<name sortKey="Williams, David R" sort="Williams, David R" uniqKey="Williams D" first="David R." last="Williams">David R. Williams</name>
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	Movement Disorders (revue)
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Movement Disorders (revue)

Inhibitory Control During Smooth Pursuit in Parkinson's Disease and Huntington's Disease

Inhibitory Control During Smooth Pursuit in Parkinson's Disease and Huntington's Disease

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri